I've been a handful of times and usually enjoy everything...never Lotus of Siam good, but good.
Papaya salad w/ bbq chicken - the bbq chicken was obviously cooked earlier in the day (or yesterday?), completely dried out and gnarly, and the worst of all---tasteless
Spicy Beef with chilis ...seasoned well but with poor quality ground beef
Khao Yam - was nice
might be time to start going back to Ruen Pair